Undescribed species of Nearctic Tipulidae (Diptera). IV

Charles Paul Alexander
1964 The Great Basin naturalist  
All species discussed at this time are from California where they were collected by Dr. Dennis Hynes, Mr. Hugh B. I;eech and the present writer, the types being preserved in my collection except where indicated to the contrary. I am indebted to the other collectors for their continued interest in making known the rich Tipulid fauna of California. Tipula (Lufiatipula) cladacanthodes, n.sp. Allied to cladacantha, differing chiefly in the hypopygial characters, especially the tergite and inner
more » ... istyle, the outer basal lobe of the latter with its anterior arm slender, posterior arm short, the apical points strongly divergent. Male.-Length about 17 mm.; wing 18 mm.; antenna about 6 mm. Frontal prolongation of head subequal in length to the remainder, yellow; nasus small but distinct; palpi yellow, terminal segment brownish black. Antennae relatively long; basal three segments yellow, remainder brownish black, the basal enlargements slightly darker, especially on the outer segments; verticils shorter than the segments. Head buffy brown, more yellowed behind and surrounding the antennal bases; vertex with a capillary blackish median line. Thoracic dorsum almost uniformly yellow, the usual praescutal stripes faintly differentiated. Pleura yellowed, vaguely patterned with darker yellow areas; dorsopleural membrane clear yellow. Halteres with stem yellow, knob dark brown. Legs with coxae and trochanters orange yellow; femora brownish yellow, tips darker brown; tibiae and basitarsi yellowish brown, remainder of tarsi darker; claws toothed. Wings brownish yellow, prearcular field, costal region and stigma slightly darker, proximal end of the last more yellowed; obliterative band before cord extensive; veins brownish yellow. Venation: Petiole of cell M^slightly exceeding m. Abdomen chiefly yellowed, midregion of tergites slightly more infuscated; hypopygium yellow. Male hypopygium generally as in cladacantha, including the bifid outer basal lobe of the inner dististyle. differing in all details of structure. Tergal lobes more obtusely rounded at apices. Inner dististyle with main body narrower; outer basal lobe distinctive, the anterior arm slender, almost parallel-sided, posterior arm shorter and diverging more strongly from body of style the apical points likewise strongly divergent.
doi:10.5962/bhl.part.22777 fatcat:4pctsserrbdu3offiebpq3wfpu